There is this married guy who wants to talk to me... help please?

[Momo]

I went to Honduras for spring break (as a mission trip for my church) and this guy went who I haven't seen in a long time (he used to go to my church and I thought he was really cute) (he is 6 years older than me) and we really connected as friends. I even told him he reminds me of my brother who is the same age as him (they are friends). We have almost everything in common. It's weird. (keep in mind during this whole trip I only viewed him as a friend) Once we got back to the U.S. he started talking to me about troubles he is having with his wife and about annulments for marriage and stuff like that (he and his wife have only been married for 1.5 years) (he is 23). Then he sent me and email saying he wants to talk at some point in time about "feelings for another person"... And he wants to talk tomorrow! I really don't want him to say he likes me and then I feel like a little home-wrecker!!! What should I do?!?!